get_info_for

# File lib/rdoc/ri/ri_driver.rb, line 84
  def get_info_for(arg)
    desc = NameDescriptor.new(arg)

    namespaces = @ri_reader.top_level_namespace
    
    for class_name in desc.class_names
      namespaces = @ri_reader.lookup_namespace_in(class_name, namespaces)
      if namespaces.empty?
        raise RiError.new("Nothing known about #{arg}")
      end
    end

    # at this point, if we have multiple possible namespaces, but one
    # is an exact match for our requested class, prune down to just it

    full_class_name = desc.full_class_name
    entries = namespaces.find_all {|m| m.full_name == full_class_name}
    namespaces = entries if entries.size == 1

    if desc.method_name.nil?
      report_class_stuff(namespaces)
    else
      methods = @ri_reader.find_methods(desc.method_name, 
                                        desc.is_class_method,
                                        namespaces)

      if methods.empty?
        raise RiError.new("Nothing known about #{arg}")
      else
        report_method_stuff(desc.method_name, methods)
      end
    end
  end